Alterosa sanctaeteresae, Blahnik Table Of Contents, 2005

Blahnik Table Of Contents, Roger J., 2005, Alterosa, a new caddisfly genus from Brazil (Trichoptera: Philopotamidae), Zootaxa 991 (1), pp. 1-60 : 44-46

Alterosa sanctaeteresae , new species

Fig. 22A–D

This species is similar to Alterosa escova , A. flinti , A. fluminensis , and A. marinonii , all of which have similarly developed inferior appendages and highly modified and enlarged preanal appendages armed with spine­like setae. From all except A. flinti (with which it occurs sympatrically), it differs in possessing elongate, apically setose lateral branches from the intermediate appendages. It differs from A. flinti primarily in the shape of the preanal appendage, which in A. sanctaeteresae is more elongate and bears a mesal pad­like process with short spines and a short apical process with spine­like setae.

Adult. Color overall, dark brown; legs, palps, and antennae slightly paler, wings irregularly mottled with small light brown spots. Male forewing 5.2 mm.

Male genitalia. Tergum VIII with posteromesal margin slightly emarginate. Sternum IX with anterolateral margin broadly rounded; posteroventral margin greatly produced, extending sinuously from dorsum; tergum IX reduced, forming a mesal projection over base of tergum X, mesal projection fused to tergum X, forming distinct, dorsoventrally flattened, apically rounded projection. Tergum X narrow, basolateral margins weakly protruding, subparallel in basal half, converging apically, in lateral profile undulate; apex sensillate, rounded as viewed dorsally, not or scarcely enlarged in lateral view. Intermediate appendage heavily sclerotized, elongate, extending past preanal appendages, branched basally, both branches rod­like, mesal branch much shorter, with acuminate apex, lateral branch with apex subacute, with brush of short, stiff setae. Preanal appendage greatly enlarged, wider at base than apex, moderately elongate, not greatly modified, with loose spike of spine­like setae at apical third; apex rounded, not abruptly narrowed; preanal appendage basally with flange­like process bearing cluster of prominent, stalked, spinelike setae, process largely mesal to preanal appendage, forming rounded papillate, pad­like process bearing brush of setae from posterior margin. Inferior appendages robust; 1st article, in lateral view, short, nearly as wide as long; 2nd article longer than 1st article, relatively wide, base nearly as wide as apex of 1st article, apex only slightly enlarged; apex rounded, with prominent pad of short, stiff apicomesal setae. Phallobase tubular, relatively short, narrowing apically, scarcely curved; endotheca with paired tracts of numerous short spines, spines slightly longer basally.

Holotype male: BRAZIL: Espirito Santo: 24 km SE of Santa Teresa , el 280 m, 22.iv.1977, C.M. & O. S. Flint, Jr., ( UMSP000204555 ) ( MZUSP).

Etymology. This species is named sanctaeteresae after Santa Teresa, a municipality near the collection locality of the holotype specimen.

Figures

FIGURE 22. Alterosa sanctaeteresae, new species. Male genitalia: 22A—lateral view; 22B— dorsal view of segments IX and X; 22C—inferior appendage, dorsal view; 22D—phallic apparatus, lateral view.